Etherates of Friedel-Crafts acids with a short hydrogen bond: Symmetrical [Et2O......OEt2]+ cation in the crystal structure of the etherate (Et2O)2�HZnCl3

1985 ◽  
Vol 34 (1) ◽  
pp. 74-80 ◽  
Author(s):  
S. P. Kolesnikov ◽  
I. V. Lyudkovskaya ◽  
M. Yu. Antipin ◽  
Yu. T. Struchkov ◽  
O. M. Nefedov
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Short Hydrogen Bond

Short Hydrogen Bond between Redox-Active Tyrosine YZand D1-His190 in the Photosystem II Crystal Structure

Biochemistry ◽  
2011 ◽  
Vol 50 (45) ◽  
pp. 9836-9844 ◽  
Author(s):  
Keisuke Saito ◽  
Jian-Ren Shen ◽  
Toyokazu Ishida ◽  
Hiroshi Ishikita
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Photosystem Ii ◽  
Redox Active ◽  
Short Hydrogen Bond

Electronic spectra, ESR and crystal structure of tetrahedral halocuprates(II). The existence of cations (2tbpo·H+) with a very short hydrogen bond

1983 ◽  
Vol 72 ◽  
pp. 127-131 ◽  
Author(s):  
Antonio Carlos Massabni ◽  
Otaciro Rangel Nascimento ◽  
Regina Helena De Almeida Santos ◽  
Regina Helena Porto Francisco ◽  
Johannes Rüdiger Lechat
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Electronic Spectra ◽  
Short Hydrogen Bond

scholarly journals Structure and thermal properties

1939 ◽  
Vol 173 (955) ◽  
pp. 427-427 ◽  
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Thermal Properties ◽  
Hydrogen Bonds ◽  
Isotope Effect ◽  
Hydrogen Fluoride ◽  
Potassium Phosphate ◽  
Short Hydrogen Bond ◽  
Potassium Hydrogen ◽  
Short Hydrogen Bonds

The effect on the lattice spacings of substituting deuterium for hydrogen has been investigated for pentaerythritol, CuS0 4 5H 2 0, SrCl 2 6H 2 0, furmaric acid, KH 2 P0 4 , NaHS0 4 , urea, and KHF 2 . The main conclusion is that when the crystal structure contains hydroxyl bonds the isotope effect is small, and when it contains hydrogen bonds there is a marked expansion, which disturbs the lattice sufficiently to lead to the separation of potassium phosphate in a new crystal structure. The effect for potassium hydrogen fluoride does not suggest a short hydrogen bond in this compound. Short hydrogen bonds seem to require special resonance forces for their explanation.

scholarly journals Crystal structure of potassium sodium heptahydrogen hexamolybdocobaltate(III) octahydrate: an extra-protonatedB-series Anderson-type heteropolyoxidometalate

2015 ◽  
Vol 71 (9) ◽  
pp. 1032-1035 ◽  
Author(s):  
Ki-Min Park ◽  
Hea-Chung Joo ◽  
Uk Lee
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Hydrogen Bonding ◽  
Ion Exchange ◽  
Title Compound ◽  
Potassium Sodium ◽  
Present Structure ◽  
Short Hydrogen Bond ◽  
Exchange Technique

The title compound, KNa[CoIII(OH)7{Mo6O17}]·8H2O, was obtained by the ion-exchange technique from K3[Co(μ3-OH)6Mo6O18]·7H2O. Six μ3-O atoms and one O atom of the bridging μ2-O atom are protonated. This novel polyanion protonated by an extra H atom is an unexpected polyanion species among theB-series Anderson-type polyoxidometalates (POMs), [Xn+(μ3-OH)6Mo6O18](6–n)–] (X= heteroatom). The extra H atom (seventh H atom) in the polyanion does not lie on a crystallographic centre of symmetry, but is located at the mid-point between two μ2-O atoms of adjacent polyanions, and forms a very short hydrogen bond [2.430 (5) Å]. The present structure is considered as particularly significant in understanding noncentrosymmetric strong hydrogen bonding.

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